package hiho.ku._1163;

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int ans = 0;
		int n = in.nextInt();
		for (int i = 0; i < n; i++) {
			int x = in.nextInt();
			ans ^= x;
		}
		if (ans == 0)
			System.out.println("Bob");
		else
			System.out.println("Alice");
	}

}
